@chriscoyier Thank you. So much better. The body text in Source Code Pro was making my eyes go a bit funny.
I saw a few font-weight properties in your css. As you are only including one weight anything other than a font-weight of normal (400) or bold (700) will do nothing. I’m sure you already know this, I just thought I’d point it out.
If anyone is interested here are two of my favourite typography sites:
http://practicaltypography.com
http://webtypography.net